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node_modules/to-regex-range/index.js

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+/*!
+ * to-regex-range <https://github.com/micromatch/to-regex-range>
+ *
+ * Copyright (c) 2015-present, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+'use strict';
+
+const isNumber = require('is-number');
+
+const toRegexRange = (min, max, options) => {
+  if (isNumber(min) === false) {
+    throw new TypeError('toRegexRange: expected the first argument to be a number');
+  }
+
+  if (max === void 0 || min === max) {
+    return String(min);
+  }
+
+  if (isNumber(max) === false) {
+    throw new TypeError('toRegexRange: expected the second argument to be a number.');
+  }
+
+  let opts = { relaxZeros: true, ...options };
+  if (typeof opts.strictZeros === 'boolean') {
+    opts.relaxZeros = opts.strictZeros === false;
+  }
+
+  let relax = String(opts.relaxZeros);
+  let shorthand = String(opts.shorthand);
+  let capture = String(opts.capture);
+  let wrap = String(opts.wrap);
+  let cacheKey = min + ':' + max + '=' + relax + shorthand + capture + wrap;
+
+  if (toRegexRange.cache.hasOwnProperty(cacheKey)) {
+    return toRegexRange.cache[cacheKey].result;
+  }
+
+  let a = Math.min(min, max);
+  let b = Math.max(min, max);
+
+  if (Math.abs(a - b) === 1) {
+    let result = min + '|' + max;
+    if (opts.capture) {
+      return `(${result})`;
+    }
+    if (opts.wrap === false) {
+      return result;
+    }
+    return `(?:${result})`;
+  }
+
+  let isPadded = hasPadding(min) || hasPadding(max);
+  let state = { min, max, a, b };
+  let positives = [];
+  let negatives = [];
+
+  if (isPadded) {
+    state.isPadded = isPadded;
+    state.maxLen = String(state.max).length;
+  }
+
+  if (a < 0) {
+    let newMin = b < 0 ? Math.abs(b) : 1;
+    negatives = splitToPatterns(newMin, Math.abs(a), state, opts);
+    a = state.a = 0;
+  }
+
+  if (b >= 0) {
+    positives = splitToPatterns(a, b, state, opts);
+  }
+
+  state.negatives = negatives;
+  state.positives = positives;
+  state.result = collatePatterns(negatives, positives, opts);
+
+  if (opts.capture === true) {
+    state.result = `(${state.result})`;
+  } else if (opts.wrap !== false && (positives.length + negatives.length) > 1) {
+    state.result = `(?:${state.result})`;
+  }
+
+  toRegexRange.cache[cacheKey] = state;
+  return state.result;
+};
+
+function collatePatterns(neg, pos, options) {
+  let onlyNegative = filterPatterns(neg, pos, '-', false, options) || [];
+  let onlyPositive = filterPatterns(pos, neg, '', false, options) || [];
+  let intersected = filterPatterns(neg, pos, '-?', true, options) || [];
+  let subpatterns = onlyNegative.concat(intersected).concat(onlyPositive);
+  return subpatterns.join('|');
+}
+
+function splitToRanges(min, max) {
+  let nines = 1;
+  let zeros = 1;
+
+  let stop = countNines(min, nines);
+  let stops = new Set([max]);
+
+  while (min <= stop && stop <= max) {
+    stops.add(stop);
+    nines += 1;
+    stop = countNines(min, nines);
+  }
+
+  stop = countZeros(max + 1, zeros) - 1;
+
+  while (min < stop && stop <= max) {
+    stops.add(stop);
+    zeros += 1;
+    stop = countZeros(max + 1, zeros) - 1;
+  }
+
+  stops = [...stops];
+  stops.sort(compare);
+  return stops;
+}
+
+/**
+ * Convert a range to a regex pattern
+ * @param {Number} `start`
+ * @param {Number} `stop`
+ * @return {String}
+ */
+
+function rangeToPattern(start, stop, options) {
+  if (start === stop) {
+    return { pattern: start, count: [], digits: 0 };
+  }
+
+  let zipped = zip(start, stop);
+  let digits = zipped.length;
+  let pattern = '';
+  let count = 0;
+
+  for (let i = 0; i < digits; i++) {
+    let [startDigit, stopDigit] = zipped[i];
+
+    if (startDigit === stopDigit) {
+      pattern += startDigit;
+
+    } else if (startDigit !== '0' || stopDigit !== '9') {
+      pattern += toCharacterClass(startDigit, stopDigit, options);
+
+    } else {
+      count++;
+    }
+  }
+
+  if (count) {
+    pattern += options.shorthand === true ? '\\d' : '[0-9]';
+  }
+
+  return { pattern, count: [count], digits };
+}
+
+function splitToPatterns(min, max, tok, options) {
+  let ranges = splitToRanges(min, max);
+  let tokens = [];
+  let start = min;
+  let prev;
+
+  for (let i = 0; i < ranges.length; i++) {
+    let max = ranges[i];
+    let obj = rangeToPattern(String(start), String(max), options);
+    let zeros = '';
+
+    if (!tok.isPadded && prev && prev.pattern === obj.pattern) {
+      if (prev.count.length > 1) {
+        prev.count.pop();
+      }
+
+      prev.count.push(obj.count[0]);
+      prev.string = prev.pattern + toQuantifier(prev.count);
+      start = max + 1;
+      continue;
+    }
+
+    if (tok.isPadded) {
+      zeros = padZeros(max, tok, options);
+    }
+
+    obj.string = zeros + obj.pattern + toQuantifier(obj.count);
+    tokens.push(obj);
+    start = max + 1;
+    prev = obj;
+  }
+
+  return tokens;
+}
+
+function filterPatterns(arr, comparison, prefix, intersection, options) {
+  let result = [];
+
+  for (let ele of arr) {
+    let { string } = ele;
+
+    // only push if _both_ are negative...
+    if (!intersection && !contains(comparison, 'string', string)) {
+      result.push(prefix + string);
+    }
+
+    // or _both_ are positive
+    if (intersection && contains(comparison, 'string', string)) {
+      result.push(prefix + string);
+    }
+  }
+  return result;
+}
+
+/**
+ * Zip strings
+ */
+
+function zip(a, b) {
+  let arr = [];
+  for (let i = 0; i < a.length; i++) arr.push([a[i], b[i]]);
+  return arr;
+}
+
+function compare(a, b) {
+  return a > b ? 1 : b > a ? -1 : 0;
+}
+
+function contains(arr, key, val) {
+  return arr.some(ele => ele[key] === val);
+}
+
+function countNines(min, len) {
+  return Number(String(min).slice(0, -len) + '9'.repeat(len));
+}
+
+function countZeros(integer, zeros) {
+  return integer - (integer % Math.pow(10, zeros));
+}
+
+function toQuantifier(digits) {
+  let [start = 0, stop = ''] = digits;
+  if (stop || start > 1) {
+    return `{${start + (stop ? ',' + stop : '')}}`;
+  }
+  return '';
+}
+
+function toCharacterClass(a, b, options) {
+  return `[${a}${(b - a === 1) ? '' : '-'}${b}]`;
+}
+
+function hasPadding(str) {
+  return /^-?(0+)\d/.test(str);
+}
+
+function padZeros(value, tok, options) {
+  if (!tok.isPadded) {
+    return value;
+  }
+
+  let diff = Math.abs(tok.maxLen - String(value).length);
+  let relax = options.relaxZeros !== false;
+
+  switch (diff) {
+    case 0:
+      return '';
+    case 1:
+      return relax ? '0?' : '0';
+    case 2:
+      return relax ? '0{0,2}' : '00';
+    default: {
+      return relax ? `0{0,${diff}}` : `0{${diff}}`;
+    }
+  }
+}
+
+/**
+ * Cache
+ */
+
+toRegexRange.cache = {};
+toRegexRange.clearCache = () => (toRegexRange.cache = {});
+
+/**
+ * Expose `toRegexRange`
+ */
+
+module.exports = toRegexRange;